Drone Rules for Three Mile Island

Dauphin County, Pennsylvania (PA) • United States

Three Mile Island, Londonderry Township, PA, USA

Lat: 40.1479 • Lng: -76.7235

Rules Edit History: Three Mile Island

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May 30, 2026 11:30 AM Approved • Added NRC drone prohibition for Three Mile Island with Unit 1 restart construction, Harrisburg Class C, and Pennsylvania 18 Pa. CS 3505 state law.

Author: be5f5cb8-9839-4827-98b3-c519aa546acc (1118)

Moderation feedback

Approved Confidence: 0.90

Your proposed edit detailing the drone restrictions at Three Mile Island Nuclear Generating Station has been approved. This aligns with Nuclear Regulatory Commission (NRC) regulations, which prohibit unauthorized access to protected areas, including airspace above nuclear facilities. The added context regarding the plant's proximity to Harrisburg International Airport's Class C airspace and the refurbishment of Unit 1 enhances understanding of the area's drone flight considerations. The outline has been updated to accurately represent the restricted area.

Sources

https://www.nrc.gov/info-finder/reactors/tmi.html

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Mapped shape change

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Field	Before	After
Flight status	Unknown	NoFly
Summary	—	Three Mile Island Nuclear Generating Station (currently relicensing as TMI-2) is protected by NRC regulations prohibiting all drone operations. The site remains under federal nuclear security jurisdiction.
Mapped shapes	—	fe969360-7e64-460e-aa98-f556fbd139e4

Before

After

## Drone Rules - Three Mile Island Nuclear Station

**All drone operations are prohibited** within Three Mile Island's NRC-regulated security zone under 10 CFR Part 73.

### Airspace / Site Context
- Harrisburg International Airport (KMDT) Class C lies ~10 miles SE
- Plant sits on an island in the Susquehanna River near Middletown, PA
- Unit 1 is being refurbished for restart; construction activity adds safety concerns
- Site gained historical significance after 1979 accident; security posture reflects this

### Key Rules
- NRC security plan prohibits any UAS within the protected area perimeter
- Harrisburg Class C LAANC required for Part 107 operations in the region
- Pennsylvania state law 18 Pa. C.S. 3505 prohibits UAS over critical infrastructure
- River-based drone launches also covered under NRC security perimeter

### Source
- NRC: https://www.nrc.gov/info-finder/reactors/tmi.html

Show inline change markers

+ ## Drone Rules - Three Mile Island Nuclear Station
+ 
+ **All drone operations are prohibited** within Three Mile Island's NRC-regulated security zone under 10 CFR Part 73.
+ 
+ ### Airspace / Site Context
+ - Harrisburg International Airport (KMDT) Class C lies ~10 miles SE
+ - Plant sits on an island in the Susquehanna River near Middletown, PA
+ - Unit 1 is being refurbished for restart; construction activity adds safety concerns
+ - Site gained historical significance after 1979 accident; security posture reflects this
+ 
+ ### Key Rules
+ - NRC security plan prohibits any UAS within the protected area perimeter
+ - Harrisburg Class C LAANC required for Part 107 operations in the region
+ - Pennsylvania state law 18 Pa. C.S. 3505 prohibits UAS over critical infrastructure
+ - River-based drone launches also covered under NRC security perimeter
+ 
+ ### Source
+ - NRC: https://www.nrc.gov/info-finder/reactors/tmi.html
+